The speaker does not turn on or the built-in battery does not charge.

Check the following if you are unable to turn on the portable Bluetooth speaker.

Make sure that the portable Bluetooth speaker has enough charge.

NOTE: Connect the micro-USB cable, and charge for approximately 1 hour before turning on the power again.If the built-in battery has no remaining charge, the power will not turn on immediately after connecting the micro-USB cable. Please charge for approximately 1 hour before turning on the power again.

Make sure the USB AC adapter is connected to the speaker and the AC outlet firmly.

NOTE: Even if the battery is fully charged, try connecting the speaker to the USB AC adaptor.

Press and hold the power button until the speaker makes a start-up sound.